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ch09 - Chapter 9 Network Organization Concepts...

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Chapter 9 Network Organization Concepts Understanding Operating Systems, Fourth Edition
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Understanding Operating Systems, Fourth Edition 2 Objectives Objectives You will be able to describe: Several different network topologies—including the star, ring, bus, tree, and hybrid Three types of networks: LAN, MAN, and WAN The difference between circuit switching and packet switching Conflict resolution procedures that allow a network to share common transmission hardware and software effectively
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Understanding Operating Systems, Fourth Edition 3 Objectives (continued) Objectives (continued) You will be able to describe: The two transport protocol models (OSI and TCP/IP) and how the layers of each one compare
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Understanding Operating Systems, Fourth Edition 4 Basic Terminology Basic Terminology Network : Collection of loosely coupled processors interconnected by communication links using cables, wireless technology, or both Goal: To provide a convenient way to share resources (hardware and software) while controlling users’ access to them General configurations for OS for networks: Network operating system (NOS) Distributed operating system (D/OS)
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Understanding Operating Systems, Fourth Edition 5 Basic Terminology Basic Terminology (continued) (continued) Network operating system (NOS): Networking capability added to single-user operating system Users aware of specific computers and resources in the network Access via logon to remote host or by data transfer from remote host
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Understanding Operating Systems, Fourth Edition 6 Basic Terminology Basic Terminology (continued) (continued) Distributed operating system (D/OS): Users can access remote resources as if local resources Good control for distributed computing systems Allows resources to be accessed in a unified way Represents total view across multiple computer systems for controlling and managing resources without local dependencies Management is a cooperative process Comprised of four managers with a wider scope
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Understanding Operating Systems, Fourth Edition 7 Basic Terminology Basic Terminology (continued) (continued) D/OS must provide the following components: Process or object management Memory management File management Device management Network management
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Understanding Operating Systems, Fourth Edition 8 Basic Terminology Basic Terminology (continued) (continued) Figure 9.1: Networked management system
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Understanding Operating Systems, Fourth Edition 9 Basic Terminology Basic Terminology (continued) (continued) Advantages of D/OS over traditional systems: Easy and reliable resource sharing Faster computation Adequate load balancing Good reliability Dependable electronic communications among the network’s users
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Understanding Operating Systems, Fourth Edition 10 Basic Terminology Basic Terminology (continued) (continued) In distributed system each processor classifies other processors and resources as remote and
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